Popen a command that contains need to say yes for all outputs

Question

I need to automate the following command

cmd=\"yes | vgremove \"

whenever I code this command with

Popen(cmd.spli         


        

Answer 1

Piping is a shell feature, so you'll need shell=True on that. What you're doing without shell=True is executing yes with arguments. yes never stops executing so the subprocess never returns.